public async Task <T> Add <T>(T item) where T : class
{
var querry = context.Set <T>();
EntityEntry <T> output;
try
{
output = await querry.AddAsync(item);
}
catch (Exception E)
{
throw new Exception("400",
new Exception($"New item is invalid: {E.Message}"));
}
await context.SaveChangesAsync();
return(output.Entity);
}
